433 CDUS46 KMTR 170830 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 130 AM PDT WED SEP 17 2025 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1927 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 74 1:32 PM 90 1968 75 -1 67 MINIMUM 60 11:59 PM 49 2006 56 4 54 AVERAGE 67 66 1 61 PRECIPITATION (IN) YESTERDAY 0.00 0.88 1989 0.00 0.00 0.00 MONTH TO DATE 0.02 0.02 0.00 0.00 SINCE OCT 1 16.13 19.59 -3.46 20.23 SINCE JAN 1 7.57 12.62 -5.05 14.90 SNOWFALL (IN) YESTERDAY MM 0.0 MONTH TO DATE T SINCE SEP 1 T SINCE JUL 1 T DEGREE DAYS HEATING YESTERDAY 0 1 -1 4 MONTH TO DATE 2 18 -16 42 SINCE SEP 1 2 18 -16 42 SINCE JUL 1 92 120 -28 172 COOLING YESTERDAY 2 2 0 0 MONTH TO DATE 36 32 4 3 SINCE SEP 1 36 32 4 3 SINCE JAN 1 86 142 -56 77 ................................................................... WIND (MPH) RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION NW (300) HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION NW (300) HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (300) AVERAGE WIND SPEED 12.4 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 90 3:00 AM LOWEST 57 11:00 AM AVERAGE 74 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 75 94 1984 MINIMUM TEMPERATURE (F) 56 50 1945 1946 1988 SUNRISE AND SUNSET SEPTEMBER 17 2025.....SUNRISE 6:53 AM PDT SUNSET 7:14 PM PDT SEPTEMBER 18 2025.....SUNRISE 6:54 AM PDT SUNSET 7:12 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$